Doctor Juris, University Tübingen, 1965.
Scientific assistant University Tübingen, Federal Republic Germany, 1966-1971. Professor labor, civil and commercial law University Bremen, Federal Republic Germany, since 1971. Visiting professor Paris, 1987, 90, Austin, Texas, 1994, Autwerp, 1995, Bordeaux, 1998, Shanghai, 2005, Trento, 2006-2007.
Consultant to German trade unions and to foundations, Düsseldorf, l972—, mediator, consultant Government Slovenia, Vietnam.
Married Herta Gmelin, October 7, 1969. Children: Monika, Wolf-Peter.